A tag is a keyword or label that categorizes your question with other, similar questions. Using the right tags makes it easier for others to find and answer your question.
describes challenges related to factoring numbers and polynomials. Not related to the Factor esoteric programming language.
For challenges pertaining to problems in the field of Physics.
for challenges related to the functional programming paradigm.
A busy beaver maximises some property of the computation model (e.g. execution time, memory usage, output length) subject to the constraint that it must halt.
This challenge involves the manipulation of complex numbers, including parsing and printing them as well as performing complex arithmetic. This tag also encompasses generalised complex numbers like qu…
Used for challenges where answers make reference to themselves or their characteristics, such as length or character values. Since this is a subset of the [quine] tag, many of the same restrictions ap…
For challenges involving recursive functions, or functions or programs calling itself, directly or indirectly.
for challenges involving John Conway's Game of Life.
This challenge is related to the C++ language. Note that challenges that require the answers to be in a specific language are generally discouraged.
A challenge either involving using logic-gates as the coding language or outputting logic gates.
In a Rosetta Stone challenge, the goal is to write a solution using as many programming languages as possible.
For challenges where trigonometry plays an important role.
For questions that relate to probability or measurements, either outputting or parsing.
for challenges related to hexadecimal, or base 16, a number system that often uses the digits 0 ‐ 9 and a ‐ f.
For challenges about rearranging a set of mathematical operators or numbers to fulfill a certain expression.
for challenges which require answers to still work when a random edit to the source code is made.
for challenges involving integration or differentiation of functions.
Challenge involving processing colors. It can be either for graphical output or manipulation on color codes.
For challenges pertaining to mathematical logic and boolean algebra.
For challenges that ask for a function or involve functions in some way. (Also known as methods or subroutines.)
A high-level data structure, made of nodes, each with a maximum of 2 children (left and right). Nodes with no children are called leaves, and two nodes with the same parent are known as siblings.
Word Puzzles are "problems" presented to users, consisting of spelling/vocabulary challenges. The "problem" is solved when the user(s) decipher the correct spelling.
For challenges relating in some way to encoding messages using classical (pen and paper) ciphers. For modern ciphers, such as AES, use the [encryption] tag instead.
For challenges concerning the Rubik's Cube or variations like the Pocket Cube.
Challenges involving searching through some data to find a certain element or elements.
for challenges involving the game of tic-tac-toe (https://en.wikipedia.org/wiki/Tic-tac-toe).
Challenges that involve summarizing a large amount of data in a single, much smaller number.
Involving calculation or other usage of factorials
For challenges which are specific to numbers represented in floating-point format.
For challenges related to the processing of text input.
For challenges related to creating or implementing an algorithm.
This challenge is related to the C# language. Note that challenges that require the answers to be in a specific language are generally discouraged.
This challenge is directly related to solving, creating, or otherwise working with sudoku puzzles.
This challenge is related to Assembly language. Note that challenges that require the answers to be in a specific language are generally discouraged.
indicates that the challenge involves Roman numerals
For challenges involving a small number of words, usually related to word generation. Do not use for "Hello, World!"-like challenges.